Shearing-machine.



A. E. PETERS. SHEARING MACHINE.

APPLICATION FILED FEB. 26, 1909.

Patented June 1, 1909.

3 SHEETS-SHEET 1.

A. E. PETERS.

SHEARING MACHINE. I APPLICATION FILED FEB. 26, 1909.

923,293.. Patented June 1,1909.

3 $HEETS-SHEET 2.

A. E. PETERS. SHEARING MACHINE.

APPLICATION FILED FEB. 26,1909. 923,293. Patented June 1, 1909.

3 SHEETS-SHEET 3.

I UNITED sTA s ARTHUR E. PETERS, O'F CANTON, OHIO.

sHEARING-MAcHInE.

Specification of Letters Patent.-

Patented June 1,.1eoe.

Application filed February 26, 1909. Serial No. 480,196,

7 '0 all whom it may concern:

Be it known that I, ARTHUR E. PETERS, a citizen of the United States, residing at Cane ton, in the county of Stark and State of Ohio have invented a new and useful Im novement in Shearing-lVIachines, of which the following is a specification. Y

The invention relates to a machine for shearing sheets or plates of metal orother material, and is particularly directed to the hold-down mechanism whereby the sheets are clamped during the shearing operation.

The general object of the improvement is to couple the hold-down apron directly with the moving knife-holder by a friction clutch, whereby the apron is automaticall operated by the reci )rocating movements of the knifeholder. T iis general object and other particular benefits are attained by the mechanism, construction and arrangement illustrated in a preferred form of the machine set forth in the accompanying drawings, forming part hereof, in which Figure 1 is a perspective view of the shearing machine s lowing the improved holddown mechanism applied thereto; Fig. 2, a front elevation of one end of the machine with part of the frame in section to show details of construction Fig. 3, a vertical section of the machine on line 3-3, Fig. 2, showing afew'sheets therein and the normal position of the shearing and hold-down mechanism Fig. 4, a similar section in plane 44, Fig. 1, showing the depressed or operative position of the shearing and hold-down mechanism; Fig. 5, a horizontal section of one end of the machine on line 5-5, Fig. 4 Fig. 6, an enlarged section of the friction disks, showing the use of supplemental Washers, and Fig. 7, a fragmentary view showing the use of spring plungers for the feet of the hold-down apron.

Similar numerals refer to similar parts throughout the drawings.

The frame of the machine is composed of the bed plate 1, on each end of which are secured standards 2, which standards are connected together by the back brace 3 on which is mounted the intermediate bracket 4. The table 5 is secured on the lower jaws 6 of the standards, and ways as 7 are, provided in the standards, in which we s the ends of the up er knife-holder 8 are adapted to slide up an down. The lower knife 9 is formed or attached on the rear edge of the table and the upper knife 10 is formed or attached on the lower front edge of the upper knife-holder. The main shaft 11 is journaled in the bearings 12 and 12 on the standards and intermediate bracket, and on this shaft are eccentricall journaled the pit men 13 the lower ends 0 which are pivoted to the upper knife-holder at 14, by means of which the same is moved up and down in its ways in the operation of the machine.

The hold-down apron 15 is located immediately in front of the upper knife-holder and the ends as 16 of the a ron are adapted to operate in ways as 17 w rich are provided in 1; 1e respective slide-plates 18 which are formed or secured on the standards 2 which plates preferably form the forward walls of the knife-holder ways 7, as shown in section in Fig. 5. The upward movement of the apron in its ways 1s limited by bumpers as 19, preferably made of resilient material, one of which bumpers is secured in each way, preferably by means of the holder 20 which 1s held by the stud bolt 21 entered through the slotted aperture 22, and is adjusted by tirhe gib key 23, as shown in sectional detail in The hold-down shaft 24 is horizontally located and journaled in the bearings 25, preferably on the forward side of the apron; one or more pinions 26 are secured on this shaft and extend through the openings 27 formed in the apron, and these pinions are adapted to mesh with the corresponding racks 28 formed or attached on the upper knife-holder. A-series of disks 29 and 29 are mounted on the shaft and while being secured against rotation thereon as by the feather 30, they are free to move endwise along the shaft. One or more rings 31 are provided between the respective disks, preferably around the hubs as 32 which are formed on certain disks, and these rings are held against rotation with the disks by means of the projecting shoulders 33 which abut the edges 34 of the opening in the apron.

The disks and rings are preferably located alongside the corresponding pinion, and are adapted to be compressed together against the pinion by means of the spiral spring 35 and the nut 36 which is screwed on the free end of the shaft, preferably with the intervening washer 37. It is evident that by a suitable adjustment of the nut. the friction betweenthe disks and the rings -can be varied at will, thus controlling the rotation of the shaft in its bearings; and that by adjustmg this frietion to prevent a rotation of the shaft, the apron will benormally sustained by the upper knife-holder through the engagement of the teeth of the racks and pinlons. 4

In the operation of the machine, the sheets 38 are placed on the table with the edges ex-' tending underneath the feet 39 of the apron and beyond the edge of the lower knife, as

. shown in Fig. 3. The machine is then operated to lower the upper knife, the edge of which is normally located above the feet of the apron, andv in so doing the apron also drops downward until its feet rest upon the sheet. It is evident that by reason of the gearing connections, a further downward movement of the upper knife-holder will roat once by reason of the friction of its coulpling mechanism until its ends abut t e bumpers, whereupon a further raising of the knife-holder serves to rotate the hold-down shaft by overcoming the friction of the disks and rings, which brings the parts in position for another operation. It is evident that the apron is started upward just as soon as the upward movement of the knife-holder begins, so that the sheared sheets are promptly released and can be moved to insert other sheets during the upward operation of the machine, thus saving time in this respect. And it is evident that the clamping action of the hold-down apron can be increased at will by merely increasing the pressure of the disks against the rings by an adjustment of the compressing devices.

In practice, it is preferred to prevent undue wear of the disks and rings by oiling their contact faces, and it is also sometimes desirable to rovide the intervening washers 40 of wood, fi er, bronze or other suitable material between the disks and rings as shown in Fig. 6, which serves to increase the friction and to reduce abrasion. The spring plungers 41 may also be provided in the feet 39 of the hold-down apron, as shown in Fig. 7, which serve to cushion the clam ing efiect of the apron and to compensate or any variation in the thickness of the sheets. The safety stops 42 may also be formed or secured on the upper knife-holder, which stops are adapted to operate in the openings 43 in the a ron, and by abutting the upper ends 44 of t ese openings will serve to raise and su port the hold-down apron in the event the frictional mechanism fails to perform its functions, by reason of improper adjustment, accident or other cause. But it will be understood that these safety stops are not essential, nor are they intended to be 0 erative in the normal use of the machine. be apertures 45 and 45 are preferably provided in the flanges of the slide plates and the ends of the apron, which a ertures are so located as to register with eac other when thea ron is raised to its inoperative position, in w iich position it may be held by inserting pins (not shown) through the apertures, and by loosening the friction devices it is evident that the machine can be operatedwithout using the apron.

What I. claim as my to secure by Letters Patent, is

1. In a shearing machine, a moving knife- .holder and a reciprocating hold-down apron with bumpers to sto the upward movement of the apron; and a riction coupling between the knife-holder and the apron including a rotatable shaft on the apron, a inion on the shaft, a rack on the knife-ho der mes with the pinion, disks feathered on the sha t with intervening non-rotatable rings, and adjustable means for compressing the disks and rings together.

2. In a shearing machine, a moving knifeholder and a reciprocating hold-down apron with bumpers .to sto the upward movement invention, and desire of the apron; and a riction coupling between the knife-holder and the apron including a rotatable shaft on the apron, a inion onthe shaft, a rack 'onthe knifeho der meshing with the pinion, disks feathered on the shaft with intervening non-rotatable rings, and, means for compressing the disks. and. rings together.

3. In a shearing machine, a moving knifeholder and a reciprocating hold-down apron with bumpers to stop the upward movement of the. apron; and a friction coupling between the knife-holder and the apron including a rotatable shaft on the apron, a gearin connection between the shaft and the eholder, disks feathered on the shaft with intervening non-rotatable rings, and adjustable means for compressing the disks and rings together. i

4. In a shearing machine, a moving knifeholder and a reciprocating hold-down apron with bumpers to stop the upward movement of the apron; and a friction coupling between the knife-holder and the apron including a rotatable shaft on the apron, a gearin connection between the shaft and the nifeholder, disks feathered on the shaft with intervening non-rotatable rings, and means for compressing the disks and rings together.

5. In a shearing machine, a moving knifeholder'and a reciprocating hold-down apron with bumpers to stop the upward'movement of the apron; and a friction couplingbetween rotatable-shaft on the one, a

exams the knife-holder and the apron including a sari connection between the shaft and t e ot feathered on the shaft with'intervening nonrotatable rings, and adjustable, means forcompressin the disks and rings together.

6. "In a shearing machine, a moving knifeholder and a reciprocating hold-down apron with bumpers to stop the upward movement of the a ron and a friction coupling between the kni e-holder and the apron including a rotatable shaft on the one, a gearing connection between the shaft and the other, disks feathered on the shaft with intervening nonrotatable rings, and means for compressing the disks and rings together.

.7. In a shearing machine, a moving knifeholder and areciprocating hold-down apron with bumpers to stop the upward movement of the apron; and a friction coupling between the knife-holder and the apron includi a shaft adjacent thereto, a series of rotata le disks with intervening rings on the shaft, adjustable means for compressing the disks and the rings together, a gearing connection between the rings and the knife-holder, and means coordinated With the apron for controlling the rotation of the rings with reference to the disks.

8. In a shearing machine, a moving knifeholder and a reciprocating hold-down apron with bumpers to stop the upward movement of the apron; and a friction coupling between the knife-holder and the apron includim a shaft adjacent thereto, a series of rotata le disks with intervening rings on the shaft, means for compressing the disks and the rings together, a gearing connection between the rings and the knife-holder, and means coordinated with the apron for controlling the rotation of the rings with reference to the disks.

9. In a shearing machine, a moving knifeholder and a reciprocating hold-down apron with bumpers to stop the upward movement of the apron; and a friction coupling between the knife-holder and the apron includin a shaft adjacent thereto, a series of rotatable disks with intervening rings on the shaft, adjustable means for compressing the disks and the rings together, a gearing connection between the rings and the knife-holder, and means respectively coordinated with the knife-holder and the apron for controlling the relative rotation of the disks and the rings.

10. In a shearing machine, a moving knifeholder and a reciprocating hold-down apron with bumpers to sto the upward movement of the apron; and a riction coupling between the knife-holder and the apron including a shaft adjacent thereto, a series of rotatable disks with intervening rings on the shaft,

means, for compressing the disks and the rings together, a gearing connection between er, disks the wings and the knife-holder, and means res ectively coordinated with. the knifeho der and the apron for controlling the relative rotation of the disks and the rings.

:11; A friction coupling between the movingI-knif -holder and thehold-down apron of a shearin machine, including a rotatable shaft on 't e apron, a inion on the shaft, a rack on the knife-hol er meshing with the pinion, disks feathered on the shaft with intervening non-rotatable rings, and adjustable means for compressing the disks and rings together.

12. A friction couplin between the moving knife-holder and the; old-down apron of a shearing machine, including a rotatable shaft on the apron, a" inion on the shaft, a rack on the knife-hol er meshing, with the pinion, disks feathered on the shaft with intervening non-rotatable rings, and means for compressing the disks and rings together.

13. A friction coupling between the moving knife-holder and the hold-down apron of a shearin machine, including a rotatable shaft on t e apron, a caring connection be-, tween the shaft and t e knife-holder, disks feathered on the shaft with intervening nonrotatable rings, and adjustable means for compressing the disks and rings together.

14. A friction couplinglbetween the moving knife-holder and the old-down apron of a shearing machine, including a rotatable shaft on the apron, a gearing connection between the shaft andrthe knife-holder, disks feathered on the shaft with intervening nonrotatable rings, and means for compressing the disks and rings together.

15. A friction coupling between the moving knife-holder and the hold-down apron of a shearing machine, including a rotatable shaft on the one, a gearing connection be tween the shaft and the other, disks feathered on the shaft with intervening non-rotatable rings, and adjustable means for compressing the disks and rings together.

16. A friction coupling between the moving knife-holder and the hold-down apron of a shearing machine, including a rotatable shaft on the one, a gearin connection between the shaft and the ot er, disks feathered on the shaft with intervening non-rotatable rings, and means for compressing the disks and rings together.

'17. A friction couplin between the moving knife-holder and the%10ld-d0WI1 a ron of a shearing machine, including a she t adjacent thereto, a series of rotatable disks with intervening rings on the shaft, adjustable means for compressing the disks and the rings together, a gearing connection between the rings and the knife-holder, and means coordinated with the apron for controlling the rotation of the rings with reference to the disks.

18. A friction coupling between the movintervening rings on the shaft, means for compressing the disks and the rings together,

'a gearingconnection between the rings and the knife-holder, and means coordinated with the apron for controlling the rotation of the rings with reference to the disks.

19. A friction coupling between the mov ing knife-holder and the hold-down apron of a shearing machine, including a shaft adjacent thereto, a series of rotatable disks with intervening rings on the shaft, adjustable means for compressing the disks and the rings together, a gearing connection between the rings and the knife-holder, and means respectively coordinated with the knifeholder and the a ron for controlling the relative rotation 0 the disks and the rings. 20. A friction coupling between the movf ing knife-holder and the hold-down a ron of a shearing machine, including a sha tadjacent thereto, a series of rotatable disks with intervening rings on the shaft, means for compressing the disks and the rings together a gearing connection between the rings an the knife-holder, and means respectively I coordinated with the knife-holder and the apron for controlling the relative rotation of t 1e disks and the rings.

ARTHUR E. PETERS.

Witnesses: I

HARRY FREASE, J OSEPH FREASE. 

